I think I need a SPST 12 V, 30 A latching relay.
I would like to fit the circuit to my van for a machine which cannot be run whilst the vehicle is in motion. Therefore I will use a micro switch with the clutch pedal, therefore when the clutch pedal is pressed the machine does not work. I will be wiring the micro switch output to the relay (coil side), then put a negative to the other side of the coil. Then I will have a common from the battery to the relay. Then I will have the output of the relay to the machines on/off switch.
Now my problem is that I would also like a momentary switch in this circuit somewhere, so that even if the clutch is not pressed the machine is not on. I can't use the normal machine off switch as it is too far in the back of the van. Where would I put this switch and which exact relay do I need for this setup?